package com.sky.Aspect;

import com.sky.annotation.AutoFill;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.time.LocalDateTime;

import static com.sky.constant.AutoFillConstant.*;

@Aspect
@Component
@Slf4j
public class AutoFillAspect {

	@Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointCut() {
    }
    @Before("autoFillPointCut()")
    public void autoFill(JoinPoint joinPoint) throws InvocationTargetException, IllegalAccessException, NoSuchMethodException {
        log.info("前置通知");
        MethodSignature signature = (MethodSignature)joinPoint.getSignature();//获取方法签名
        AutoFill autoFill= signature.getMethod().getAnnotation(AutoFill.class);//获取方法上的注解
        OperationType operationType = autoFill.value();//获取操作类型
        Object[] args = joinPoint.getArgs();//获取参数
        if(args==null||args.length==0){
            return;
        }
        Object entity = args[0];//获取实体
        LocalDateTime now = LocalDateTime.now();
        Long currentId = BaseContext.getCurrentId();
        if(operationType == OperationType.INSERT){
            //插入操作
            Method setCreateTime = entity.getClass().getDeclaredMethod(SET_CREATE_TIME,LocalDateTime.class);
            Method setCreateUser = entity.getClass().getDeclaredMethod(SET_CREATE_USER,Long.class);
            Method setUpdateTime = entity.getClass().getDeclaredMethod(SET_UPDATE_TIME,LocalDateTime.class);
            Method setUpdateUSer = entity.getClass().getDeclaredMethod(SET_UPDATE_USER,Long.class);
            setCreateTime.invoke(entity,now);
            setCreateUser.invoke(entity,currentId);
            setUpdateTime.invoke(entity,now);
            setUpdateUSer.invoke(entity,currentId);
        }else if(operationType == OperationType.UPDATE){
            //更新操作
            Method setUpdateTime = entity.getClass().getDeclaredMethod(SET_UPDATE_TIME,LocalDateTime.class);
            Method setUpdateUSer = entity.getClass().getDeclaredMethod(SET_UPDATE_USER,Long.class);
            setUpdateTime.invoke(entity,now);
            setUpdateUSer.invoke(entity,currentId);
        }
        log.info("后置通知");
    }
}
